NAME

Debian::Rules - handy manipulation of debian/rules

SYNOPSIS

    my $r = Debian::Rules->new('debian/rules');
    my $r = Debian::Rules->new( { filename => 'debian/rules' } );
    $r->is_dhtiny && print "Using the latest and greatest\n";
    $r->is_quiltified && print "quilt rules the rules\n";
    # file contents changed externally
    $r->parse;
    $r->add_quilt;
    $r->drop_quilt;
    $r->write;  # or undef($r);

DESCRIPTION

Some times, one needs to know whether debian/rules uses the dh(1) tiny variant, or whether it is integrated with quilt(1). Debian::Rules provides facilities to check this, as well as adding/removing quilt integration.

Modified contents are written to file either vie the "write" method, or when the object reference goes out of scope (via DESTROY).

CONSTRUCTOR

"new" is the standard Class::Accessor constructor, with the exception that if only one, non-reference argument is provided, it is treated as a value for the filename field.

If a file name is given, the constructor calls "read" to read the file contents into memory.

One of filename or lines is mandatory.

FIELDS

filename

Contains the file name of the rules file.

lines

Reference to an array pointing to the rules file. Initialized by "new".

METHODS

parse

Parses the rules file and stores its findings for later use. Called automatically by is_dhtiny and is_quiltified. The result of the parsing is cached and subsequent calls to "is_XXX" use the cache. To force cache refresh (for example if the contents of the file have been changed), call "parse" again.

is_dhtiny

Returns true if the contents of the rules file seem to use the so called tiny variant offered by dh(1). Tiny rules are detected by the presence of the following two lines:

    %:
            dh $@
    

(any options on the "dh" command line ignored).

is_quiltified

Returns true if the contents of the rules file indicate that quilt(1) is used. Various styles of "quilt" integration are detected:

add_quilt

Integrates quilt(1) into the rules. For dh(1) tiny rules (as determined by "is_dhtiny") "--with=quilt" is added to every "dh" invocation. For the more traditional variant, quilt is integrated via quilt.make and its "$(QUILT_STAMPFN)" and "unpatch" targets.

drop_quilt

Removes quilt(1) integration. Both dh(1) tiny style ("dh --with=quilt") and traditional ("$(QUILT_STAMPFN)" and "unpatch") approaches are detected and removed.

read [file name]

Replaces the current rules content with the content of filename. If filename is not given, uses the value of the "filename" member.

write [filename]

Writes the in-memory contents filename. If not given, uses the value of the "filename" member.

If "lines" points to an empty array, the file is removed.

COPYRIGHT & LICENSE

Copyright (C) 2009, 2010 Damyan Ivanov <dmn@debian.org>

Copyright (C) 2014 gregor herrmann <gregoa@debian.org>

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.